CN210514439U - Live working safety detection device for grounding electrode circuit - Google Patents
Live working safety detection device for grounding electrode circuit Download PDFInfo
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- CN210514439U CN210514439U CN201920943526.1U CN201920943526U CN210514439U CN 210514439 U CN210514439 U CN 210514439U CN 201920943526 U CN201920943526 U CN 201920943526U CN 210514439 U CN210514439 U CN 210514439U
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Abstract
The utility model provides a ground electrode circuit live working safety inspection device, includes the insulator spindle, sets up current detection device, temperature-detecting device and alarm device of insulator spindle one end. The current detection device includes: the two iron cores are oppositely arranged and can be opened and closed to surround the tested wire; the Hall element is positioned between the gaps of the two iron cores; and the current signal processing circuit is connected with the Hall element so as to convert the magnetic flux detected by the Hall element into current data of the tested lead. The temperature detection device includes: the temperature sensor is arranged on the inner side surface of the iron core and used for sensing the temperature of the surface of the measured lead; and the temperature signal processing circuit is connected with the temperature sensor to process temperature data. The alarm device is used for sending out different alarm information according to different current data and/or temperature data. The utility model discloses earthing pole circuit behavior and live working security can be judged to the device, and live working's safety is guaranteed and is developed.
Description
Technical Field
The utility model relates to an earthing pole circuit live working safety inspection device for judge earthing pole circuit operational aspect and live working security, ensure that live working's safety develops.
Background
With the operation of more and more direct current transmission projects, the live-line maintenance operation of the grounding electrode line is increasingly emphasized, and the development requirement is increasingly increased. Although the grounding electrode line has the characteristics of a distribution line and a transmission line, the safety requirement of live working of the grounding electrode line is obviously different from that of the conventional line due to the particularity of the operation mode of the grounding electrode line. The operation modes of the direct-current transmission line include three types: 1) the bipolar operation mode is a normal operation mode of the DC system, wherein the load current mainly flows through the positive and negative electrode lines, while the unbalanced current only flows through the ground electrode line, and the maximum unbalanced current is generally I according to the specification of DL/T5224 N1%, generally several tens of amperes, at this time, the maximum operating voltage is generally 100-. 2) If the earth is damaged, the DC system can be operated in a single-pole metal loop mode, the load current completely passes through the pole line, and the earth line can be disconnected from the neutral point. If the induced voltage between the grounding electrode line and other lines is not counted, no voltage or current exists on the grounding electrode line. 3) When a main device or direct current polarity of a certain pole converter station fails, the system can operate in a single-pole ground loop mode, and rated load current of the system flows through a single-pole line and a grounding pole line. At the moment, the maximum operation voltage of the grounding electrode circuit does not exceed 5kV, the current is 5000A, and the long-term operation temperature of the lead is 120 ℃ at most.
The coping schemes adopted by live working are different aiming at different operation modes of the grounding electrode circuit. When the bipolar operation is carried out, unbalanced current on the grounding polar line is small, and the voltage is low, so that the operation can be carried out according to a conventional live working mode; when the single-pole metal return wire runs, because no voltage or current exists on the grounding electrode wire, a power failure maintenance operation mode can be adopted; when the single-pole ground return wire operates, large load current exists on the grounding pole wire, so that the temperature of the grounding pole wire is obviously increased, and at the moment, the protection of potential safety hazards caused by high-temperature wires is also required to be considered besides the safety protection of conventional live working.
Therefore, before the live-line work is carried out on the earth electrode circuit, the current running state of the earth electrode circuit needs to be checked firstly, so that a corresponding work scheme is formulated, corresponding safety protection measures are taken, and a work tool conforming to the current situation is used, so that the safety of a worker is guaranteed.
SUMMERY OF THE UTILITY MODEL
The utility model provides an earthing pole circuit live working safety inspection device to judge which kind of live working mode and safeguard procedures of adoption, ensure earthing pole circuit live working's safety.
According to the utility model discloses an aspect provides an earthing pole circuit live working safety inspection device, include:
an insulating rod;
set up the current detection device of insulator spindle one end, this current detection device includes: the two iron cores are oppositely arranged and can be opened and closed to surround the tested wire; the Hall element is positioned between the gaps of the two iron cores; the current signal processing circuit is connected with the Hall element to convert the magnetic flux detected by the Hall element into current data of a detected lead;
a temperature sensing device comprising: the temperature sensor is arranged on the inner side surface of the iron core and used for sensing the temperature of the surface of the measured lead; and the temperature signal processing circuit is connected with the temperature sensor to process temperature data.
Optionally, the device further comprises an alarm device which sends out different alarm information according to different current data and/or temperature data.
Optionally, the current signal processing circuit and the temperature signal processing circuit are respectively connected to an alarm triggering circuit for triggering the alarm device through a signal receiving circuit.
Optionally, the temperature signal processing circuit includes: the comparison circuit is used for comparing the temperature data acquired by the temperature sensor with a set threshold value and is connected with the signal receiving circuit so as to transmit a comparison result to the alarm trigger circuit.
Optionally, when the current data is below 10A, the alarm device sends out first alarm information; when the current data is within the range of 10A-100A, the alarm device sends out second alarm information; and when the current data is more than 100A, the alarm device sends out third alarm information.
Optionally, when the current data is below 10A and the temperature data is lower than a set threshold, the alarm device sends out first alarm information; when the current data is within the range of 10A-100A and the temperature data is lower than a set threshold value, the alarm device sends out second alarm information; when the current data is more than 100A and the temperature data is higher than the set threshold value, the alarm device sends out third alarm information.
Optionally, a display for displaying the current data and/or the temperature data is also included.
The utility model has the advantages that:
1. is accurate and reliable. The direct current detection device and the temperature detection device are adopted, the operation mode of the grounding electrode circuit can be comprehensively and accurately judged, and an alarm signal is sent out by an alarm device such as an indicator light and/or a buzzer to inform an operator so as to adopt an applicable operation mode.
2. The operation is convenient. The detection device belongs to an integrated form, and utilizes a Hall sensor, a temperature sensor and a corresponding electronic circuit to acquire signals and can automatically judge and process the signals detected by the sensors. When detecting, the operation personnel only need make two iron cores open earlier, after being arranged in between two iron cores by the earth electrode circuit, make two iron cores closed again can, convenience simple to use.
3. The operation is safe. Current detection device and temperature-detecting device install on the insulator spindle for the operation personnel with be in insulating isolated state by the earth electrode circuit, can not take place to electrocute the injury accident, operation safe and reliable.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 shows a schematic structural diagram of an earth electrode line live working safety detection device according to an embodiment of the present invention.
Fig. 2 shows a schematic structural diagram of a current detection device according to an embodiment of the present invention.
Fig. 3 shows a bias circuit topology of a current detection device according to an embodiment of the present invention.
Fig. 4 shows an imbalance compensation circuit topology of a current detection device according to an embodiment of the present invention.
Fig. 5 shows an amplifying circuit topology of a current detection device according to an embodiment of the present invention.
Fig. 6 shows a modified circuit topology of a current detection device according to an embodiment of the present invention.
Fig. 7 shows an a/D conversion circuit topology of a current detection device according to an embodiment of the present invention.
Fig. 8 shows a block circuit diagram of a temperature detection device according to an embodiment of the present invention.
Fig. 9 shows a comparison circuit topology of a temperature detection device according to an embodiment of the present invention.
Fig. 10 shows a block circuit diagram of an alarm device according to an embodiment of the invention.
Fig. 11 shows an alarm triggering circuit topology according to an embodiment of the present invention.
Detailed Description
Fig. 1 shows a schematic structural diagram of an earth electrode line live working safety detection device according to an embodiment of the present invention. Fig. 2 shows a schematic structural diagram of a current detection device according to an embodiment of the present invention. Referring to fig. 1 and 2, the detecting device includes an insulating rod 1, a temperature detecting device for detecting the surface temperature of the detected wire, a current detecting device disposed at the front end of the insulating rod 1 for detecting the current of the detected wire, a display for displaying the current data and/or the temperature data, and an alarm device for sending different alarm messages according to the different current data and/or the different temperature data.
Referring to fig. 2, the current detecting device includes two iron cores 10, 11, a driving part for driving the two iron cores 10, 11 to open and close, a hall element 12, and a current signal processing circuit. The two iron cores 10 and 11 are arc-shaped structures, are oppositely arranged and can be opened and closed. When the iron cores 10 and 11 are opened, the tested lead can be placed between the two iron cores; after folding, a ring structure which surrounds the tested conducting wire is formed, the ring structure is not closed, and a gap 13 for placing the Hall element exists, namely: after closing, the two cores 10, 11 are in contact at one end and a gap 13 is present between the other ends. Wherein, the utility model discloses do not limit to the concrete structure of the drive unit who drives two iron cores 10, 11 and open and shut, can adopt prior art to realize.
With continued reference to fig. 2, a current signal processing circuit is coupled to the hall element 12 to convert the magnetic flux detected by the hall element 12 into current data for the wire under test. The current signal processing circuit includes a bias circuit, an unbalanced voltage compensation circuit, an amplification circuit, a correction circuit, and an a/D conversion circuit, and the structures of these circuits can be referred to fig. 3 to 7. The hall element 12 detects a magnetic flux, and the magnetic flux is processed by a bias circuit and an unbalanced voltage compensation circuit to form a voltage signal, and the voltage signal is converted into a digital signal by an amplifier circuit and an a/D converter circuit, and the digital signal is displayed by a display.
Fig. 8 shows a block circuit diagram of a temperature detection device according to an embodiment of the present invention. As shown in fig. 8, the temperature detecting device includes a temperature sensor 4 and a temperature signal processing circuit, the temperature sensor 4 is disposed on the inner side of the iron core to sense the temperature of the surface of the measured lead, and the temperature signal processing circuit is connected to the temperature sensor 4 to process the temperature data. The temperature signal processing circuit comprises an amplifying circuit, an A/D conversion circuit and a comparison circuit. The structure of the comparison circuit can refer to fig. 9, and the comparison circuit compares the temperature data collected by the temperature sensor with a set threshold value and transmits the comparison result as an output signal to the alarm device. In a possible embodiment, the set threshold value for the temperature may be 45 ℃.
Fig. 10 shows a block circuit diagram of an alarm device according to an embodiment of the invention. As shown in fig. 10, the alarm circuit includes a signal receiving circuit, an alarm trigger circuit, an indicator light, and a buzzer, and the current signal processing circuit and the temperature signal processing circuit are respectively connected to the alarm trigger circuit for triggering the indicator light and the buzzer through the signal receiving circuit. The output signal of the current signal processing circuit can be divided into three levels: 10A or less; 10A-100A; more than 100A; the temperature signal processing circuit outputs a judgment signal for judging whether the temperature exceeds a set threshold value. The signal receiving circuit converts the input signal into an input signal of the alarm trigger circuit through processing, and the alarm trigger circuit judges the running state of the grounding electrode circuit through processing and triggers a corresponding alarm indication. The structure of the alarm trigger circuit can refer to fig. 11.
In one possible embodiment, the alarm rules are as follows: when the operating current detection value of the grounding electrode circuit is below 10A and the temperature detection value is lower than 45 ℃, the alarm device sends first alarm information, if the indicator lamp is not on and the buzzer does not sound, the grounding electrode is in a single-pole metal loop operating mode, and a power failure maintenance mode can be adopted; when the operating current detection value of the grounding electrode circuit is within the range of 10A-100A and the temperature detection value is lower than 45 ℃, the alarm device sends out second alarm information, such as an indicator lamp flickers and a buzzer sends out alarm sound, which indicates that the grounding electrode is in a bipolar operating mode, and a conventional live working mode can be adopted; when the operating current detection value of the grounding electrode circuit is more than 100A and the temperature detection value is higher than 45 ℃, the alarm device sends third alarm information, if the indicator lamp continuously lights and the buzzer sends out alarm sound, the grounding electrode is in the monopolar ground loop operation, and a live working mode is adopted and corresponding high-temperature protection measures are taken.
The utility model discloses can be integrated on the control circuit board 3 that sets up at 1 front end of insulator spindle with temperature-detecting device's temperature signal processing circuit, current detection device's current signal processing circuit, alarm device, be located the switch 2 of 1 rear end of insulator spindle and conduct the utility model discloses earthing pole circuit live working safety inspection device's total control switch.
Claims (7)
1. The utility model provides an earth electrode circuit live working safety inspection device which characterized in that includes:
an insulating rod;
set up the current detection device of insulator spindle one end, this current detection device includes: the two iron cores are oppositely arranged and can be opened and closed to surround the tested wire; the Hall element is positioned between the gaps of the two iron cores; the current signal processing circuit is connected with the Hall element to convert the magnetic flux detected by the Hall element into current data of a detected lead;
a temperature sensing device comprising: the temperature sensor is arranged on the inner side surface of the iron core and used for sensing the temperature of the surface of the measured lead; and the temperature signal processing circuit is connected with the temperature sensor to process temperature data.
2. The earth electrode line live working safety detection device of claim 1, characterized by further comprising an alarm device for sending different alarm information according to different current data and/or temperature data.
3. The earth electrode line live working safety detection device of claim 2, characterized in that the current signal processing circuit and the temperature signal processing circuit are respectively connected with an alarm trigger circuit for triggering the alarm device through a signal receiving circuit.
4. The earth electrode line live working safety detection device of claim 3, wherein the temperature signal processing circuit comprises: the comparison circuit is used for comparing the temperature data acquired by the temperature sensor with a set threshold value and is connected with the signal receiving circuit so as to transmit a comparison result to the alarm trigger circuit.
5. The earth electrode line live working safety detection device of claim 2 or 3, characterized in that when the current data is below 10A, the alarm device sends out first alarm information; when the current data is within the range of 10A-100A, the alarm device sends out second alarm information; and when the current data is more than 100A, the alarm device sends out third alarm information.
6. The earth electrode circuit live working safety detection device of claim 2, 3 or 4, characterized in that when the current data is below 10A and the temperature data is lower than a set threshold, the alarm device sends out a first alarm message; when the current data is within the range of 10A-100A and the temperature data is lower than a set threshold value, the alarm device sends out second alarm information; when the current data is more than 100A and the temperature data is higher than the set threshold value, the alarm device sends out third alarm information.
7. The earth electrode line live working safety detection device of claim 1, further comprising a display for displaying current data and/or temperature data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920943526.1U CN210514439U (en) | 2019-06-21 | 2019-06-21 | Live working safety detection device for grounding electrode circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920943526.1U CN210514439U (en) | 2019-06-21 | 2019-06-21 | Live working safety detection device for grounding electrode circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210514439U true CN210514439U (en) | 2020-05-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920943526.1U Withdrawn - After Issue CN210514439U (en) | 2019-06-21 | 2019-06-21 | Live working safety detection device for grounding electrode circuit |
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| Country | Link |
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| CN (1) | CN210514439U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110333380A (en) * | 2019-06-21 | 2019-10-15 | 国家电网有限公司 | Ground electrode circuit live-working safety detection device |
| CN113589108A (en) * | 2021-08-23 | 2021-11-02 | 南通通明集团有限公司 | High-voltage transmission line detection method |
-
2019
- 2019-06-21 CN CN201920943526.1U patent/CN210514439U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110333380A (en) * | 2019-06-21 | 2019-10-15 | 国家电网有限公司 | Ground electrode circuit live-working safety detection device |
| CN113589108A (en) * | 2021-08-23 | 2021-11-02 | 南通通明集团有限公司 | High-voltage transmission line detection method |
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Granted publication date: 20200512 Effective date of abandoning: 20230315 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20200512 Effective date of abandoning: 20230315 |